Burger With Caramelized Onions And Mushrooms: Juicy beef burgers w/ homemade sauce topped with sautéed mushrooms and caramelized onions. Perfect for dinner! Burger With Caramelized Onions And Mushrooms So the other night my husband and I were laying in bed watching TV. I got closer and whispered seductively in his ear: 'Can you tell me what would be your ultimate burger?' He looked a bit surprised since he didn't expect that question and answered candidly 'definitely caramelized onions, swiss cheese and sautéed mushrooms' So as you can see, I delivered! These bad boys have a delicious and tangy homemade sauce

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